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Answer :
Final answer:
A child who is airborne sensitive may react to an allergen by coming into contact with allergen particles in the air. This is a type I hypersensitivity reaction, which can cause symptoms such as sneezing and nasal congestion.
Explanation:
A child who is airborne sensitive may react to an allergen after coming into contact with particles of the allergen in the air. This type of reaction falls into the category of type I hypersensitivity, also known as an immediate hypersensitivity reaction. When a presensitized individual inhales or comes into contact with allergens like pollen, dust mites, or animal dander, their immune system rapidly responds, causing symptoms such as sneezing, nasal congestion, and itchy, watery eyes.
These reactions are part of the body's immune response against what it mistakenly perceives as a harmful substance, even though these allergens are typically harmless proteins. In the case of airborne allergens, prominent allergic conditions include allergic rhinitis (hay fever) and bronchial asthma.
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